Howdy Maxwell, I've got a SA M1A-A1 which is the bush rifle in a choate folder. Have you ever shot the folder? It is a complete POS! Even with an 18" bbl the thing has no balance point. If it does, it is somewhere around the piston nut. Add another 4" of bbl and you'll be shooting at your feet. Then, the length of pull is about 14.5". I'm 6' tall and of normal stature and this is too long for me. Now, let's move on to the accentuated recoil thru your cheek bone. You've heard how the M-14 is so smooth to shoot, low recoil, etc. This stock erases any such notion.
My advice is to save your pennies and by a cool laminated stock or glass stock and paint it camo. Fred's can set you up. Go whole hog and get the E-2 stock for a pistol grip. As typed above, if not an GI original, McMillan sells one that has an adjustable cheek piece.
As for my gun, I put a fajen laminate on it. Looks sweet and shoots the same. The folder gathers dust until I decide to sell the rifle some day, not today, sorry. Good luck.